Have a look at the pic first .
JetPhotos.Net Photo » JY-AYI (CN: 569) Royal Wings Airbus A320-212 by Radek Oneksiak
What are those things projecting out from the trailing edge under the wing called ??? They are below the flaps .There are 3 of them on each wing for A320 which I think are reducing in size as you move towards the wing tips. The engine is between the first and second one .
Thank you .